When $HESTIA is not loaded script doesn't work

install/upgrade/manual/configure-server-smtp.sh

@@ -13,6 +13,8 @@
 #----------------------------------------------------------#
 
 # Includes
+# shellcheck source=/etc/hestiacp/hestia.conf
+source /etc/hestiacp/hestia.conf
 # shellcheck source=/usr/local/hestia/func/main.sh
 source $HESTIA/func/main.sh
 # shellcheck source=/usr/local/hestia/conf/hestia.conf
@@ -78,4 +80,4 @@ function setupFiles
 	fi
 }
 
-setupFiles
+setupFiles